Selco Genesis 1700 AC/DC, Руководство по ремонту

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10.3) Inverter stage
The inverter stage is the second power conversion block. This
stage carries out the DC/AC conversion allowing an AC voltage
to be obtained at a frequency.
The AC voltage is fed to the transformer primary. Since the
dimensions of the transformer are inversely proportional to
the frequency of the voltage applied, the fact of switching at
high frequency makes it possible to have transformers of small
dimensions and with lower magnetic losses compared to the
50/60HZ mains frequency transformers.
The transformer, in addition to adapting the voltage and cur-
rent levels, also allows the galvanic insulation required by the
applicable regulations to be obtained between the user and
the mains.
The inverter provided by Selco for the Genesis 1700AC/DC
and Genesis 2200AC/DC machines is a resonant inverter of
the Zero Voltage Switching type. Therefore, the switchings of
the electronic switches are made when the voltage is nil, thus
reducing the switching losses and increasing the efficiency of the
system. The regulation of the output power is done by the Phase
Switching technique.
Inverter driver stage and control system are DSP (Digital Signal
Processing).